Dasgupta, C. ; Halley, J. W. (1993) Phase diagram of the two-dimensional disordered Hubbard model in the Hartree-Fock approximation Physical Review B: Condensed Matter and Materials Physics, 47 (2). pp. 1126-1129. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v47/i2/p1126_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.47.1126
Abstract
Ground-state properties of the two-dimensional Hubbard model with point-defect disorder are investigated numerically in the Hartree-Fock approximation. The phase diagram in the p(point defect concentration)-δ(deviation from half filling) plane exhibits antiferromagnetic, spin-density-wave, paramagnetic, and spin-glass-like phases. The disorder stabilizes the antiferromagnetic phase relative to the spin-density-wave phase. The presence of U strongly enhances the localization in the antiferromagnetic phase. The spin-density-wave and spin-glass-like phases are weakly localized.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 83244 |
| Deposited On: | 17 Feb 2012 04:08 |
| Last Modified: | 17 Feb 2012 04:08 |
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